[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 January 26 issued 2333 UT on 19 Jan 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 JANUARY) 
Date   T index  Conditions    
19 Jan    95    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1119UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Depressed by 30% during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 25% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 18 01 2026 2240UT and is in progress

Monthly T index:
Month  T index
Dec      110
Jan      89
Feb      88


2. FORECAST (20 JANUARY - 22 JANUARY)
Date   T index  Conditions       MUFs                              
20 Jan    45    Poor             25 to 50% below predicted monthly 
                                 values
21 Jan    45    Fair-poor        25 to 35% below predicted monthly 
                                 values    
22 Jan    60    Normal-fair      Depressed 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 11 was issued 
on 19 January and is current for 19-21 Jan. ASWFC SWF HF Communications 
Warning 12 was issued on 19 January and is current for 19-21 
Jan. Maximum Usable Frequencies (MUFs) on UT day 19-Jan were 
mostly near predicted monthly values, tending toward 25% depressions 
after local dawn following the onset of geomagnetic activity. 
Strong spread-F was observed in the Southern Australian region. 
MUFs in the Australian region are expected to be depressed by 
25-50% on 20-Jan and 25-35% depressed on 21-Jan due to ongoing 
geomagnetic activity. MUFs are expected to be near predicted 
monthly values to 15% depressed on 22-Jan. Shortwave fadeouts 
are possible.

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For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au